Method and system for setting offset of oil pressure sensor

摘要

A technique for setting offset of a hydraulic pressure sensor which senses operation oil pressure is provided herein. In particular, ignition-off is detected and an ignition-off time point and remaining pressure of the object to be sensed are stored. The remaining pressure is sensed by the hydraulic pressure sensor at the ignition-off time point and stored accordingly. Additionally, whether an ignition is turned on or not after the ignition-off is also detected and an ignition-on time point is stored, when the ignition-on is detected after the ignition-off. A time lapse between the ignition-on from the ignition-off time point is then calculated along with the reduced pressure corresponding to the time lapse due to the time lapse. As a result, a value obtained by subtracting the reduced pressure from the remaining pressure of the hydraulic pressure sensor is set and applied as the offset of the hydraulic pressure sensor.

主权项

1. A method of setting offset of a hydraulic pressure sensor which senses hydraulic pressure of an object to be sensed, the method comprising:
detecting, by a detector, ignition-off; storing, on a storage device, an ignition-off time point and a remaining pressure of the object to be sensed, the remaining pressure being sensed by the hydraulic pressure sensor at the ignition-off time point; detecting, by the detector, whether an ignition is turned on after the ignition-off; storing, by the storage device, an ignition-on time point, when the ignition-on is detected after the ignition-off; calculating, by a processor, a lapse in time between the ignition-on time point and the ignition-off time point; obtaining, by the processor, a pressure reduction amount per unit time stored in advance in a mapping table; calculating, by the processor, a reduced pressure by multiplying the pressure reduction amount per unit time by the lapse in time; and setting and applying, by the processor, a value obtained by subtracting the reduced pressure from the remaining pressure of the hydraulic pressure sensor, as the offset of the hydraulic pressure sensor.